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Indiana Rep. Joe Donnelly is taking an unusual jab at his party’s leadership in a campaign ad that refers to climate change legislation as “Nancy Pelosi’s energy tax.”

The two-term Democrat is pulling a page from Republican strategists in trying to distance himself from policies that have some voters wary.

In one ad, Donnelly says he voted against Pelosi’s “energy tax on Hoosier families.”

Another ad touts his votes to crack down on illegal immigration. Donnelly says he doesn’t work for the “Washington crowd” as a photograph of President Barack Obama, Pelosi and House Minority Leader John Boehner flashes by.

Overdevelopment, Overpopulation, Overshoot

Overdevelopment, Overpopulation, Overshoot

Slide 13

Airplane Contrails: Globalized transportation networks, especially commercial aviation, are a major contributor of air pollution and greenhouse gas emissions. Photo of contrails in the west London sky over the River Thames, London, England.

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R.J. Sangosti/Denver Post

Overdevelopment, Overpopulation, Overshoot

Fire: More frequent and more intense wildfires (such as this one in Colorado, USA) are another consequence of a warming planet.